輻輳したATM網においてTCPのデッドロックを回避する動的粒度制御アルゴリズム A Dynamic Granularity Control Algorithm for Avoiding TCP Deadlocks over Congested ATM Networks

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Conventional TCP suffers throughput deadlocks over congested ATM (Asynchronous Transfer Mode) networks due to retransmission timeouts caused by cell loss at ATM level under heavy congestion. A modified congestion control algorithm for TCP is proposed to improve the effective throughput of IP over ATM UBR even in a situation such that an external CBR pressure exist at the same port of the ATM switch. When TCP faces congestion then TCP will reset its retransmission timer. In the proposed algorithm, the MSS (maximum segment size) is reduced from 9140 bytes, the recomended value in RFC 1612, at the same time. When TCP is in fast retransmit machine phase, the MSS is reduced to 512 bytes. A considerable improvement in the effective throughput of TCP has been achieved by these two modifications under relatively small switch buffer size and high CBR stream pressure. The idea, called "Dynamic Granularity Control (DGC)", have been implemented and evaluated on the Linux kernel.

収録刊行物

  • システム制御情報学会論文誌

    システム制御情報学会論文誌 15(6), 288-293, 2002-06-15

    一般社団法人 システム制御情報学会

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各種コード

  • NII論文ID(NAID)
    10008646260
  • NII書誌ID(NCID)
    AN1013280X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13425668
  • NDL 記事登録ID
    6163099
  • NDL 雑誌分類
    ZM11(科学技術--科学技術一般--制御工学)
  • NDL 請求記号
    Z14-195
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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